Body mass index calculator



FIG. 1 is a perspective view of a body mass index calculator, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a perspective view of the body mass index calculator of FIG. 1 shown in its environment.

The broken lines shown herein are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a body mass index calculator, as shown and described. 